On July 3rd, 2015, in Bonn, the chairman of the German Bishops Conference (Deutschen Bischofskonferenz), Cardinal Reinhard Marx, and the President of the Central Committee of German Catholics (Zentralkomitees der deutschen Katholiken, ZdK), Alois Glück, disclosed the guidance “invest ethically-sustainable”. This should support the financial players in the church institutions for investing their money, taking into account ethical criteria. It includes discussion of these criteria and gives practical advices on the implementation of an ethically oriented investment policy.